Unformatted text preview: 4 Hence we get P(A) = 1 − P(Ac )
2.6 Notes Example 9
Suppose we rolled a fair, six–sided die 10 times. Let T be
the event that we roll at least 1 three. If one were to
calculate T you would need to ﬁnd the probability of 1
three, 2 threes, · · · , and 10 threes and add them all up.
However, you can use the complement rule to calculate
P(T ) Venn Diagrams;
Probability Laws Notes Set Operations
and Relations
Venn Diagram Solution. 2.7 Venn Diagram Venn Diagrams;
Probability Laws A Venn diagram is a diagram that shows all possible
logical relations between a ﬁnite collection of sets. Set Operations
and Relations
Venn Diagram 2.8 Notes General Addition Rule Venn Diagrams;
Probability Laws Notes The general addition rule is a way of ﬁnding the
probability of a union of 2 events. It is
P(A ∪ B ) = P(A) + P(B ) − P(A ∩ B )
Set Operations
and Relations
Venn Diagram 2.9 Inclusion–Exclusion Principle
The inclusion–exclusion principle is a way to extend the
general addition rule to...
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 Spring '08
 MARTIN
 Probability, probability laws, Operations and Relations

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